The Netflix TechBlog

OCTOBER 21, 2019

Engineers have built cost-efficient applications on top of Mantis to quickly identify issues, trigger alerts, and apply remediations to minimize or completely avoid downtime to the Netflix service. Raven which allows users to perform ad-hoc exploration of realtime data from hundreds of streaming sources using our Mantis Query Language (MQL).

Open Source 148

Open Source Metrics Engineering Processing 148

The Netflix TechBlog

DECEMBER 23, 2020

This abstraction allows the compute team to influence the reliability, efficiency, and operability of the fleet via the scheduler. We do this for reliability, scalability, and efficiency reasons. Various pieces of software used elevated capabilities for FUSE, low-level packet monitoring, and performance tracing amongst other use cases.

Media 286

Media Metrics Systems Processing 286

The Morning Paper

APRIL 16, 2019

Teaching rigorous distributed systems with efficient model checking Michael et al., Enabling students to build running performant versions of all of those systems in the time available is one challenge. Consider the lab exercise to implement Paxos. EuroSys’19. 175 undergraduates a year currently go through this course.

Systems 43

Systems Efficiency Testing Strategy 43

SQL Performance

JANUARY 12, 2022

This month, I'm going to start exploring the submitted solutions, roughly, going from the worse performing to the best performing ones. Why even bother with the bad performing ones? This article is dedicated to this poor performing approach. Despite the poor performance, working on the solution is an interesting exercise.

Code 116

Code Servers Performance Azure 116

SQL Performance

NOVEMBER 30, 2021

For each database that has pages in the buffer pool, there is a hash list of pages, in page ID order, that’s quickly searchable to determine whether a page is already in memory or whether a physical read has to be performed. It would be prohibitively expensive to do as part of query compilation. ) ; GO.

Efficiency 54

Efficiency Servers Database Cache 54

The Netflix TechBlog

OCTOBER 21, 2019

Engineers have built cost-efficient applications on top of Mantis to quickly identify issues, trigger alerts, and apply remediations to minimize or completely avoid downtime to the Netflix service. Raven which allows users to perform ad-hoc exploration of realtime data from hundreds of streaming sources using our Mantis Query Language (MQL).

Open Source 101

Open Source Metrics Engineering Processing 101

O'Reilly

JUNE 15, 2023

Efficiency, not human flourishing, is maximized. Governance is not a “once and done” exercise. In his book Voices in the Code , James G. There is no perfectly efficient algorithm that gets everything right. The consequences, like those of Midas’s touch, aren’t pretty. Humans are seen as a cost to be eliminated.

Government 96

Government Best Practices Energy Efficiency 96

The Netflix TechBlog

OCTOBER 21, 2019

Engineers have built cost-efficient applications on top of Mantis to quickly identify issues, trigger alerts, and apply remediations to minimize or completely avoid downtime to the Netflix service. Raven which allows users to perform ad-hoc exploration of realtime data from hundreds of streaming sources using our Mantis Query Language (MQL).

Open Source 100

Open Source Metrics Engineering Processing 100

The Netflix TechBlog

MAY 27, 2020

From failure injection testing to regularly exercising our region evacuation abilities, Netflix engineers invest a lot in ensuring the services that comprise Netflix are robust and reliable. CORE is a team consisting of Site Reliability Engineers, Applied Resilience Engineers, and Performance Engineers.

Engineering 104

Engineering Innovation Systems Architecture 104

Percona

AUGUST 8, 2023

Or worse yet, sometimes I get questions about regaining normal operations after a traffic increase caused performance destabilization. Unfortunately, this topic is more of an art than a science, given that there is really no foolproof algorithm or approach that can tell you exactly where you might hit a bottleneck with server performance.

Traffic 87

Traffic Cache Monitoring Database 87

The Netflix TechBlog

MARCH 6, 2019

This is just one of many use cases that MezzFS supports, but all the use cases share a similar theme: stream the right bits of a remote object efficiently and expose those bits as a file on the filesystem. MezzFS collects metrics on data throughput, download efficiency, resource usage, etc.

Media 214

Media Storage Processing Cache 214

The Agile Manager

MARCH 31, 2024

As a learning exercise, it is fantastic. I keep a record of what I do on individual stones, on how I configure machines and the maintenance I perform on them, and for the totality of activities I do in the workshop each day. Those tests have limited information value: they either work or they do not work. Indirect tax?

FinTech 40

FinTech Education Testing Website 40

Dynatrace

JUNE 1, 2021

Application performance monitoring (APM) is the practice of tracking key software application performance metrics using monitoring software and telemetry data. Practitioners use APM to ensure system availability, optimize service performance and response times, and improve user experiences. Application performance management.

Monitoring 148

Monitoring Mobile Social Media Artificial Intelligence 148

SQL Performance

APRIL 14, 2021

I also love his efficient and eloquent writing style. It has excellent performance, and there’s quite a lot that you can learn from it. Evaluating earlier solutions, one of the important factors in getting good performance was the ability to employ batch processing. I love Paul White ’s work. Well, he did , and it’s fascinating!

C++ 112

C++ Servers Testing Code 112

The Netflix TechBlog

FEBRUARY 10, 2021

It can be a nightmare to work efficiently. We wanted a way to ensure that we can have a consistent user experience while also sharing as much code as possible. This greatly reduces the number of bugs and improves the overall health and performance of every application that uses the design system.

Design 230

Design Systems Engineering Entertainment 230

John McCalpin

AUGUST 1, 2018

Bandwidth, performance analysis has two recurring themes: How fast should this code (or “simple” variations on this code) run on this hardware? If I am analyzing (apparent) performance shortfalls, how can I distinguish between cause and effect ? The source code to the library may not be available.

Hardware 40

Hardware Transportation Performance Latency 40

O'Reilly

OCTOBER 19, 2021

If you peek under the hood of an ML-powered application, these days you will often find a repository of Python code. Let’s start by considering the job of a non-ML software engineer: writing traditional software deals with well-defined, narrowly-scoped inputs, which the engineer can exhaustively and cleanly model in the code.

DevOps 137

DevOps Software Engineering Infrastructure Open Source 137

The Agile Manager

JANUARY 31, 2017

The distribution operation was built on efficiencies: fill delivery trucks to a minimum of 80% capacity and deliver products to customers on routes optimized for time and energy consumption. Distribution is about efficiency, because efficiency translates into price. At this point, the cracks started to appear.

Retail 45

Retail Energy Logistics Efficiency 45

Sutter's Mill

JANUARY 25, 2021

On a humorous note, O(N) remains O(N) no matter how hard we try to make it efficient: MyAssert( std::is_sorted( std::execution::par, begin(s), end(s) ) ); // still O(N) arbitrarily expensive, but good try! What does the answer to Question 1 imply for assertion checking?

C++ 45

C++ Programming Cache Testing 45

Testsigma

MARCH 6, 2020

Regression testing comprises re-running the test cases of already stable features and finding out if the new code changes attributed to the new release led to any negative impacts on the existing functionalities. Regression checks should start as soon as a new build is released for testing and should be repeated for every new code build.

Best Practices 52

Best Practices Testing Code Testing Tools 52

CSS - Tricks

APRIL 1, 2021

Site performance is potentially the most important metric. The better the performance, the better chance that users stay on a page, read content, make purchases, or just about whatever they need to do. With all of this in mind, I thought improving the speed of my own version of a slow site would be a fun exercise. Lighthouse.

Cache 92

Cache Social Media Media Network 92

Alex Russell

AUGUST 30, 2021

Anyone who cares to download and fork the code can do so. " The eventual Blink fork was precipitated by an insurmountable difficulty in doing precisely what Apple suggested to Congress: contributing code upstream to WebKit to enable new features. It's worth assessing these claims from most easily falsified to most contested.

Engineering 98

Engineering Open Source Website Operating System 98

The Agile Manager

AUGUST 31, 2020

Decades of poor architecture guidelines and lax developer discipline resulted in the commercial-off-the-shelf components of an ERP becoming inseparable from the custom code built around it. The exercise of assessing, modeling and dispositioning the landscape does offer valuable new ways of looking at legacy assets.

Architecture 52

Architecture Code Strategy Programming 52

SQL Performance

JUNE 10, 2020

That is, does SQL Server perform a substitution process whereby it converts the original nested code into one query that goes directly against the base tables? The answer is simple, to shorten the code by having the inner query use the infamous SELECT *. That’s safe and will get handled optimally in terms of index matching.

C++ 109

C++ Database Servers Code 109

SQL Performance

JUNE 10, 2020

That is, does SQL Server perform a substitution process whereby it converts the original nested code into one query that goes directly against the base tables? The answer is simple, to shorten the code by having the inner query use the infamous SELECT *. That’s safe and will get handled optimally in terms of index matching.

C++ 93

C++ Database Servers Code 93

Sutter's Mill

FEBRUARY 17, 2020

Otherwise, you’ll either get the implicitly generated move functions, or else requests to move will automatically just do a copy instead, since copy is always a valid implementation of move (it just doesn’t exercise the non- const option). Yes, in my view it does make it a buggy class that shouldn’t pass code review.

C++ 98

C++ Testing Design Strategy 98

Alex Russell

SEPTEMBER 20, 2020

Circa '07, those web apps were notably slower than native code could be. In '07, safety implied an unacceptable performance hit on slow single-core devices with 128MiB of RAM. Sandboxing is now universal (tho quality may differ) and we collectively got savvy about running code quickly while retaining memory safety.

Hardware 64

Hardware Mobile Programming Java 64

The Agile Manager

NOVEMBER 30, 2014

Sometimes it is divestiture or separation: sprawling firms that serve different buyers or markets don't achieve much in the way of operating efficiency, and a "conglomerate discount" priced into their equity means there is value that can be released by dividing a firm into multiple businesses. IT is at the center of deal synergy.

Airlines 40

Airlines Efficiency Systems Processing 40

John McCalpin

JANUARY 22, 2018

Introduction: In December 2017, my colleague Damon McDougall (now at AMD) asked for help in porting the fused multiply-add example code from a Colfax report ( [link] ) to the Xeon Phi x200 (Knights Landing) processors here at TACC. Instead, we found puzzle after puzzle. Instead, we found puzzle after puzzle.

Latency 40

Latency Hardware Code Testing 40

The Agile Manager

FEBRUARY 23, 2009

For example, in the Java world we can measure all kinds of attributes of code: overcomplicated expressions, wasteful use of resources, ghost code, duplicate code, complexity, and so forth. Good in the sense that code quality doesn’t need to be taken for granted, because we can measure attributes of the asset we’re creating.

Government 40

Government Metrics Java Code 40

Brendan Gregg

NOVEMBER 13, 2017

Alice is great at fixing hard bugs, writing test suites, doing code merges, and other unglamorous work. He is brilliant at convincing the company to let him do what he wants, even when that ignores market demand or his own past performance. Other staff devise processes to work around Bob, reducing the company's efficiency.

Engineering 111

Engineering Energy Technology Technology 111

The Agile Manager

APRIL 14, 2009

In the prior installments of this series, we presented a pattern for how PMOs can better bridge the gap between executive and executor: First, we discussed the need to define progress in terms of business needs met and not technical tasks performed, so that we measure in terms of results, not effort.

Games 40

Games Government Metrics Testing 40

Strategic Tech

DECEMBER 12, 2019

We have to specify with great precision in code exactly what our business rules are, and the computer will apply them exactly as we tell it to. It acts as a collaboration tool to balance the need for business correctness, user experience, and technical efficiency. The answer is performance, but more importantly concurrency conflicts.

Healthcare 10

Healthcare Software Architecture Database Software 10

The Agile Manager

OCTOBER 28, 2007

They go on to report that 70% of the cases of these 7 chronic illnesses are preventable through lifestyle change: diet, exercise, avoiding cigarettes and what not. This wording is intentional: how work is performed reduces the probability of failure. Reducing the probability of failure is the reduction of unforced errors.

Government 40

Government Retail Energy Code 40